19423

19423 is a natural number that follows 19422 and precedes 19424. It is a five-digit odd integer and, in mathematics, is notable for being a prime number: it has no positive divisors other than 1 and itself.

Basic numeric properties include a digit sum of 19 (digital root 1) and congruences such as 19423 ≡ 1 (mod 6) and 19423 ≡ 3 (mod 4). In positional notation it is written as 19423 in base 10; its binary representation is 100101111011111 and its hexadecimal representation is 0x4BDF.

As a prime, 19423 does not factor into smaller integers and therefore cannot be expressed as a product of two nontrivial natural numbers. Like other primes, it can serve as a building block in number-theoretic constructions and cryptographic applications when considered in appropriate contexts. Outside pure mathematics, the numeral 19423 can appear as an identifier (for example in cataloguing, product codes, or other indexing systems), where its mathematical primality has no direct bearing on its use.